Aggregate Gradation and Binder PropertiesThe aggregate gradation is critical to differentiate SMA and HMAbecause typical HMA is densely graded whereas typical SMA isgap-graded. The determination of the gradation of the extractedaggregate in this study was in accordance with AASHTO T30(AASHTO 2014a). The asphalt binder content was determinedfollowing AASHTO T164 (AASHTO 2014c) by extracting theasphalt binder from the field cores using 85% Toluene and 15%